| Muis, C. (Händlergarantien) |
Attest |
NVPH |
1 j |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) |
Attest |
NVPH |
1 j III |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
NVPH |
101 B |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) |
Attest |
NVPH |
12 I A |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) |
Attest |
NVPH |
149 - 162 |
| Louis, Albert (BPP (Bund Philatelistischer Prüfer)) |
Attest |
NVPH |
2 |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) |
Attest |
NVPH |
2 a I |
| van Balen Blanken, G. C. (Sonstiges) |
Attest |
NVPH |
2 c |
